All you need is a small amount of vertical space around a balcony or an open window which can hang or store a vertical array of drink bottles that can grow all your herbs and lettuce easily. Recycle as many of your plastic drink containers.
Growing a lemon trees from seed is surprisingly easy. Generally, lemon trees flourish outdoors year-round in hot areas, but they can also grow indoors as edible houseplants. How To Grow A Lemon Tree From Seed